Holding device for car-brake mechanism



' Aug. 21,1923.

' H. E. ANDERSON nowzm nmvxcs FOR CAfi'BRAKE MECHANISM Filed May 1. 1922 2 Sheets-Sheet 1 Aug. 21,1923. 21.4%5328 9 H. .E. ANDERSON HbLDING DEVICE FOR CAR BRAKE MECHANISM Filed Mag 1. 1922 2 Sheets-Sheet 2 if Q Q 4 1 517 5% 4 1/? (.9 v

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HARLEY 3:]. ANDERSON, OF CHICAGO, ILLINOIE, AQSIGNOB, IBY

MESIIE ASSIGNMENTS,

T30 ATQIERIGAN HAND BRAKE COIEPANY, A CORPORATION OF ILLTNOIS.

. HOLDINGDEVIGE FOR CAR-BRAKE MECHANISM.

Application filed May '1, 1922, Serial No. 557,706.

To all whom it may concern Be it known that I, HARLEY E. ANDERSON, a. citizen of the United States, residing at Chicago, in the county of Cook and State a of Illinois, have invented certain new and useful Improvements in Holding. Devices for Car-Brake Mechanism, of which the following is a specification.

My invention relates to apparatus for in manipulating the brakes of a railway car of the type comprising a rack bar, or other like element whichis raised by suitable mechanism for setting the brakes; and the object of the invention is to provide a new 15 and improved releasable holding device for the rackbar consisting of a aw. simply constructed parts which may be readily assembled without nuts or bolts, are compactly arranged and suitably housed, and are very strong so as to withstand the rough usage to which freight car appliances are, liable, the i type of brake apparatus with which my im provement is particularly concerned being adapted especially for carsin freight service. The invention consists of the new and improved arrangements, devices and constructions to be hereinafter described and claimed for carrying out the above stated object and such other incidental objects as will be referred to in the, following description of thepreferred embodiment oi": the invention-illustrated in the accompanying "drawings.

In the drawings, a Fig. 1 is a fragmentary view, in per spective, of a car brake manipulating apparatus containing the improvement of my invention; i

' Fig. 2 is a verticalsectional view through the upper part of the apparatnst Fig. 3 is a view, in perspective, of the rear side of the housing at theupper end of the apparatus, and associated parts, the housing being shown as removed from the t5 car. I

Fig. dis a sectional plan view on line il-4t of Fig. 2, and I Figs. 5, 6 and 7 are detail views; in perspective, of the parts of the'holding device. The releasable holding device of my in vention is shown as forming part of a brake manipulating apparatus which, in other respects, islike that shown in my pending application Serial No. 490,080 filed August 5,

.able rack bar or 1921. It will be obvious, however, that the device might be used to advantage in other types of brake mechanism employing a movequivalent member.

7 The braking apparatus in connection with" which my invention is illustrated, consists of the following parts 10 is a bell crank pivoted to a bracket 11 at the bottom ot-the car end wall l2. 13 is a chain which is attached to the bell crank and winds over a surface 1.4 thereon, the chain forming a part of the brake rigging underneath the car by means of which the brake shoes are forced against the car wheels. 15 is a rack bar vertically movable through a housing 16 secured by lugs 17 to the car wall, and 18 is a rod loosely connected at its upper end to rack bar 15 and formed with a clevis 19 for pivotally engaging bell crank 10. Rack bar 15 is formed with a series of teeth 20 adapted to be engaged by the teeth 21 of a mutilated pinion 22 fixed to a shaft 23 having a journal 2 lprojecting into a vertical slot 25 in the front of the housing and a journal 26. projecting into an elongated pocket 27 formed on the inner wall of the housing parallel with slot 25, journals 24: and. 26 being adapted to seat and rotate upon the curved surfaces at the bottom of slot 25 and pocket 27. 28 is a lever fixed to the shaft 23. i The rack bar 15 is raised to set the brakes step by step by intermittent oscillationsv of the lever 28. When the lever is raised teeth 21 on the mutilated pinion 22 engage with the teeth on rack bar 15 to raise the rack bar, and assuming that the rack bar is held in the raised position, by the mechanism to be described, a reverse rotation of the lever by its own weight when released causes the pinion 22 to ride up the rack bar serving to tree the teeth 21 oi the pinion from the teeth of the rack bar, whereupon. the pinion, and lever, will drop to their normal position (Figs. 1 and 2).

The improved device for holding the rack bar in its several elevated positions is constructed as followsz'29 is a shaft provided with journals 30, 31 and an intervening squared portion 32. The j ournal turns in a circular opening 33 in the front of the housing. The journal 31 extends through a boss 34- formed on the back wall oi. the housing. The shaft is formed at its inner end with a head 35 provided with stop shoulders 36, 87. 38 is a detent formed with a tooth 39 to engage the holding teeth 40 on the rack bar 15 and with a jaw portion 41 to engage the squared portion 32 of shaft 29 from one side of the shaft. The detent is held in position on the shaft by the rack bar,

no boltsor other fastenings being required. 42 is a weight which is, gene ally speaking, segmental in shape and is formed with an annular portion l3 which bears upon the boss 34 011 the housing. The weight is undercut at a l to receive the head 35 on shaft 29 and is formed with an arcuate lug 45 adapted to engage one or other of the shoulders 36, 37 on the head. The weight is preferably p1O-' vided with a finger piece l6.

When the weight is in the full line position, as shown in Fig. 3, the detent is rocked into engagement with teeth 40 on the rack bar. When the weight is turned to the dotted line position of Fig. 3 thedetent will be thrown back out of engagement with the rack bar teeth as'soon, that is, as the downward pull on the rack is relieved. The proper way to relieve the pull on the rack bar is to raise the same slightly by means of lever 28. However, in apparatus of this general'typethe t 'ainmen sometimes do not take the trouble to use the lever but effect the release by hitting the tripping weight with a hammer. Vith the weight formed as shown, this can be done without injury to the parts which are so designed as to withstand this and other kinds of rough usage.

It will be observed that no bolts, nuts or rivets'areused. The holding device consists of three very strong pieces of metal which may be very readily assembled andldisassembled and are held in their assembled position by an interlocking relationship which is preserved solong as the rack bar is in position in the housing.

I claim:

1. In apparatus of the character described, thecombination of a frame work, a rack movable longitudinally with respect to the frame work, a shaft revolubly mounted adj aeent to said rack, and a detent slidably mounted on said shaft from one side thereof and adapted to be swung thereby into and out of engagement with the teeth of said rack.

2. In apparatus of the character described, the combination of a frame work, a rack Inovable longitudinally with respect to the frame work, a shaft revolubly mounted adjacent to said rae and a detent slidably mounted on said shaft from the side thereof toward the rack and adapted to be swun by the shaft into and out of engagement with the teeth of therack, the rack when in position serving to prevent withdrawal of the detent from the shaft.

3. In apparatus of the character described,

so as to be swung bythe shaft into and out of g engagement with the teeth of saidrack.

l. in apparatus of the character described,

the combinationof ahousing, a rack, having holding teeth, which ismovable up and down through the housing, a shaft journaled in the housing, a portion of which is polygonal in cross section, a detent having a tooth to engage the holding teeth on the rack bar, and'a j aw portion seating over the polygonal part of said'shaft. V

5. In apparatus of the character described, the combination of a housing, a'rack, having holding teeth, which is movable up and down through the housing, a shaft journaled in the housing, a portion of which is polygonal in cross section, a detent having a tooth to engage the holding teeth on the rack bar, a jaw portion seating over the polygonal part'of said shaft,and a tripping weight revoluble coaxially with said shaft and having a lost motion engagement withthe shaft.

(5. In apparatus of the character described, the combination of a housing, a rack, having holding teetln which is movable up and down through the housing, a shaft journaled in the housing detent non-rotatably engaged with the shaft, and a trippingweight revoluble coaxially with the shaft having a lost motion engagement therewith.

7 In apparatus of the character described,

vthe combination of a housing, a rack, having holding teeth, which is movable up and, down through the housing, a shaft journaledin the housing, a portion of which is polygonal in cross section, a detenthaving a tooth to engage the holding teeth on the rack. bar, ajaw portion seating over the polygonal part of said shaft, said shaft having a head formed with shoulders, and a tripping weight revoluble coaxially with the shaft formed with an arcuatelug adapted to engage one orfother "of the'shoulders on' the head to hold thdetent in or out of engagementwith the rack,

8. In apparatus of the character descr bed,

the combination of a housing, a rack, having holding teeth, which is movable up and down through the housing,a shaft having journals at opposite endsand an intermediate squared portion, bosses on the housing in which said journals bear, a detent havinga tooth to engage the holding teeth on the rack, and aw portion to engage the squared portion of sa d shaft, 21 weight revolubly mountedflon one'of said bosseson the housing and'formed with a recess to receive said head, and an arcuate'lug projecting into said recess andadapted to en gage one or other of the stop shoulders on the head. r i I Q 9, In an apparatus of. the characterde scribed, the combinationfof a frame work, a rack movable longitudinally with respect to 10. In an apparatus of the character described, the combination of a frame Work, a rack movable longitudinally with respect to the frame work, a shaft revolubly mounted adjacent to said rack, a detent mounted on said shaft and adapted to be swung by the shaft into and out of engagement with the rack, a tripping weight revolubly mounted on said frame work with respect to said shaft, and lugs on said'shaft and said tripping weight adapted by interengagcment to rock the shaft for carrying the detent alternatively into and out of engagement with the rack as the weight swings from one side of the shaft to the other side.

11. In an apparatus of the character described, the combination of a frame work, a rack movable longitudinally with respect to the frame work, a shaft revolubly mounted adjacent to said rack, a detent mounted on said shaft and adapted to be swung by the shaft into and out of engagement with the rack, a tripping weight revolubly mounted on a boss carried by the frame work about said shaft, a head on said shaft serving to hold the tripping weight in operative po tion on said boss, and means for rocking the shaft for carrying the detent alternatively into and out of engagement with the rack as the tripping weight swings from one side of the shaft to the other side, said shaft be ing held against removal by the continued engagement of the detent with the shaft.

12. In an apparatus of the character described, the combination of a frame work, a rack movable longitudinally with respect to the frame work, a shaft revolubly mounted adjacent to said rack, a detent slidably mounted onsaid shaft from one side thereof and adapted to be swung by the shaft into and out of engagement with the rack, a tripping weight revolubly mounted on a boss carried by the frame work about said shaft, a head on said shaft serving to hold the tripping weigh-t in operative position on said boss, and means for rocking the shaft for carrying the detent alternatively into and out of engagement with the rack as the trip ping weight is swung from one side of the haft to the other side, said shaft being held against removal by the continued engagement of the detent with the shaft, and the detent being held against removal from the shaft by its engagement with the rack while the rack is in position in said frame work.

HARLEY E. ANDERSON. 

